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Aim: Paediatric eosinophilia is a common clinical dilemma, often leading to resource- and time-consuming assessments. We aim to evaluate the main aetiologies of eosinophilia in children from different socioeconomic settings and propose a diagnostic algorithm.
Methods: A systematic literature review was conducted through PubMed, Embase and the Cochrane Library. Studies published from January 2012 to June 2023 reporting the incidence and aetiology of peripheral eosinophilia in children were included. Evidence from studies on children originating from low- or high-income countries was compared.
Results: A total of 15 observational studies, encompassing 3409 children, were included. The causes of eosinophilia varied based on the children's origin and the eosinophilia severity. In children from high-income countries, allergic diseases were the leading cause, with a prevalence of 7.7%-78.2%, while parasitosis ranged from 1.0% to 9.1%. In children from low-income countries, parasitosis was predominant, ranging from 17.7% to 88.3%, although allergic diseases were found in 2.5%-4.8% of cases. Concerning severity, allergic diseases were the leading cause of mild-to-moderate eosinophilia; parasitosis was associated with moderate-to-severe eosinophilia, while immunological disorders were mostly found in severe cases.
Conclusion: We developed a step-up diagnostic algorithm that considers the child's origin and eosinophilia severity and could optimise resource allocation.
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http://dx.doi.org/10.1111/apa.17266 | DOI Listing |
Environ Health Prev Med
September 2025
Department of Occupational Pneumology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.
Background: Organic chemicals have been known to cause allergic diseases such as bronchial asthma and hypersensitivity pneumonitis; however, the possibility that they do not cause irreversible pulmonary fibrosis has not been considered. Polyacrylic acid (PAA), an organic chemical, has caused irreversible progressive pulmonary fibrosis in exposed workers, indicating its potential to induce pulmonary inflammation and fibrosis. Although intratracheal instillation studies are commonly used for evaluating lung pathology, traditional methods face challenges with chemical substances, particularly nanoparticles, which tend to aggregate in suspension and prevent uniform pulmonary distribution.
View Article and Find Full Text PDFJ Allergy Clin Immunol Pract
September 2025
COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Background: Studies have described sex differences in childhood asthma, allergy, and atopic dermatitis, but the development and clinical phenotype of these differences remain poorly understood.
Objective: To characterize sex differences in atopic disease throughout childhood and study the potential role of sex-steroid metabolites.
Methods: We examined sex differences in asthma, allergy, and atopic dermatitis using longitudinal generalized estimating equation models in the COPSAC (n=411) and COPSAC (n=700) birth cohorts.
J Allergy Clin Immunol
September 2025
Department of Biomedical Informatics, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Department of Epidemiology, Colorado School of Public Health, Aurora, CO, USA. Electronic address:
Background: Genetic control of gene expression in asthma-related tissues is not well-characterized, particularly for African-ancestry populations, limiting advancement in our understanding of the increased prevalence and severity of asthma in those populations.
Objective: To create novel transcriptome prediction models for asthma tissues (nasal epithelium and CD4+ T cells) and apply them in transcriptome-wide association study to discover candidate asthma genes.
Methods: We developed and validated gene expression prediction databases for unstimulated CD4+ T cells and nasal epithelium using an elastic net framework.
Immunol Lett
September 2025
National Heart and Lung Institute, Imperial College London, UK; School of Public Health, Faculty of Medicine, Imperial College London, UK.
The emergence of big data and analytic approaches initiated research efforts to characterise different subtypes of allergic diseases, including tracking disease progression and identifying patterns that may offer insight into their development and progression. Triangulation from different data sources and study types may help to elucidate the directionality of relationships between variables at a very individual level by modelling the complex interdependencies between multiple dimensions (e.g.
View Article and Find Full Text PDFJ Bras Pneumol
September 2025
. Programa de Pós-Graduação em Ciências Médicas, Universidade Federal de Santa Catarina, Florianópolis (SC) Brasil.
Objective: To describe the impact of severe asthma in a real-life cohort in Brazil, reporting on baseline clinical characteristics, access to treatment, and clinical remission under treatment with biologics.
Methods: Severe asthma patients > 6 years of age were recruited from 23 centers in Brazil. Data on clinical characteristics, lung function, biomarkers, prescribed therapies, and clinical remission under treatment were collected at the baseline visit.